Abstract: A helmet an include a shell, a liner disposed within the shell, a flexible band disposed between the shell and a portion of the liner to releasably couple the liner to the shell without glue, hook and loop fasteners, or snaps. The helmet can also include an energy-absorbing layer of expanded polystyrene (EPS) including a groove. The comfort liner can be attached to the energy-absorbing layer without glue, hook and loop fasteners, or snaps, and a flexible band can be releasably disposed between the energy-absorbing layer and the comfort liner. The helmet can also include a groove on an inner surface of an outer shell. An energy-absorbing liner can include expanded polypropylene (EPP), and a flexible band can be disposed between the outer shell and the energy-absorbing liner to provide additional energy management, to releasably couple the energy-absorbing liner to the outer shell, or both.

Abstract: A helmet comprising and outer liner and an inner liner slidably coupled to an interior surface of the outer liner is disclosed. The outer liner comprises an interior surface and the inner liner comprises an exterior surface. The inner liner is composed of an elastically deformable material. A majority of the interior surface of the outer liner and a majority of the exterior surface of the inner liner are both substantially parallel to a pseudo-spherical surface having a coronal cross section that is circular with a first radius and a sagittal cross section that is circular with a second radius different from the first radius. The inner liner is elastically deformable along the interior surface of the outer liner in response to rotation of the outer liner relative to the inner liner caused by an impact to the helmet.

Abstract: In accordance with some embodiments of the present disclosure, a controlled release buckle may comprise a buckle lock configured to engage a strap in a manner preventing the strap from moving in a loosening direction when the buckle lock is in a resting position, and to disengage the strap when the buckle lock is forced into a disengaged position, and a buckle lever configured to move the strap in a tightening direction when the buckle lever is pulled in a first direction, and to engage the strap in a manner preventing the strap from moving in a loosening direction when the buckle lever is pressed in a second direction.

Abstract: A helmet can comprise an outer shell comprising an outer surface and an inner surface opposite the outer surface, wherein the inner surface of the outer shell comprises an integrally formed locking mechanism. The helmet can also comprise a locking liner formed of a foam material and disposed within the outer shell adjacent the inner surface of the outer shell. The locking liner can further comprise at least one side piece sized to fit between a lower edge of the outer shell and top portion of the outer shell, a top piece disposed at the top portion of the outer shell and comprising a central opening, and a rotatable foam locking piece sized to fit within the central opening and comprising a tab that is sized to mateably couple with the integrally formed locking mechanism of the outer shell to releasably couple the locking liner to the outer shell.

Abstract: A bicycle helmet system comprising a helmet and a chin bar is disclosed. The chin bar is removably coupled to the helmet and wrapped circumferentially around a portion of the helmet. The chin bar may include a rear buckle configured to tighten the chin bar around the helmet. The chin bar may also include two side buckles that engage with side recesses on the helmet when the chin bar is removably coupled to the helmet. The chin bar may also include two alignment protrusions positioned to engage with alignment recesses on the helmet when the chin bar is removably coupled to the helmet.

Abstract: A helmet an include a shell, a liner disposed within the shell, a flexible band disposed between the shell and a portion of the liner to releasably couple the liner to the shell without glue, hook and loop fasteners, or snaps. The helmet can also include an energy-absorbing layer of expanded polystyrene (EPS) including a groove. The comfort liner can be attached to the energy-absorbing layer without glue, hook and loop fasteners, or snaps, and a flexible band can be releasably disposed between the energy-absorbing layer and the comfort liner. The helmet can also include a groove on an inner surface of an outer shell. An energy-absorbing liner can include expanded polypropylene (EPP), and a flexible band can be disposed between the outer shell and the energy-absorbing liner to provide additional energy management, to releasably couple the energy-absorbing liner to the outer shell, or both.

Abstract: In accordance with some embodiments of the present disclosure, a controlled release buckle may comprise a buckle lock configured to engage a strap in a manner preventing the strap from moving in a loosening direction when the buckle lock is in a resting position, and to disengage the strap when the buckle lock is forced into a disengaged position, and a buckle lever configured to move the strap in a tightening direction when the buckle lever is pulled in a first direction, and to engage the strap in a manner preventing the strap from moving in a loosening direction when the buckle lever is pressed in a second direction.

Abstract: An eyewear system includes a frame having a lens channel configured to slidably receive the lens and an opening to allow the lens to be inserted into the lens channel. The system further includes a lens configured to be slidably received into the lens channel of the frame and a latch to releasably secure the lens in the frame.

Abstract: An eyewear system includes a frame having a lens channel configured to slidably receive the lens and an opening to allow the lens to be inserted into the lens channel. The system further includes a lens configured to be slidably received into the lens channel of the frame and a latch to releasably secure the lens in the frame.